Oral hygiene device



FIG. 1 is a perspective view of an oral hygiene device showing my new design;

FIG. 2 is a front view of the oral hygiene device of FIG. 1 ;

FIG. 3 is a back view of the oral hygiene device of FIG. 1 ;

FIG. 4 is a right side view of the oral hygiene device of FIG. 1 ;

FIG. 5 is a left side view of the oral hygiene device of FIG. 1 ;

FIG. 6 is a top view of the oral hygiene device of FIG. 1 ; and,

FIG. 7 is a bottom view of the oral hygiene device of FIG. 1 .

The broken lines in the figures are for the purpose of illustrating portions of the oral hygiene device, which form no part of the claimed design. 

CLAIM The ornamental design for an oral hygiene device, as shown and described. 